<template>
	<view class="search">
		<musichead title="搜索" :icon="true" :iconBlack="true"></musichead>
		<view class="container">
			<scroll-view scroll-y="true">
				<view class="search-bar">
					<text class="iconfont iconsearch"></text>
					<input type="text" placeholder="搜索歌曲" v-model="searchWord" @confirm="handleToSearch" @input="handleToSuggest" />
					<!-- 清空搜索框并退出当前歌曲搜索界面 -->
					<text v-show="searchType == 2" @tap="handleToClose" class="iconfont iconguanbi"></text>
				</view>
				<!-- block用于条件渲染 -->
				<!-- 搜索初始界面 -->
				<block v-if="searchType == 1">
					<!-- 历史记录 -->
					<view class="search-history">
						<view class="search-history-head">
							<text>历史记录</text>
							<text class="iconfont iconlajitong" @tap="handleToClear"></text>
						</view>
						<view class="search-history-list">
							<view v-for="(item,index) in historyList" :key="index" @tap="handleToWord(item)">{{ item }}
							</view>
						</view>
					</view>
					<!-- 热搜榜 -->
					<view class="search-hot">
						<view class="search-hot-title">热搜榜</view>
						<view class="search-hot-item" v-for="(item,index) in searchHot" :key="index"
							@tap="handleToWord(item.searchWord)">
							<view class="search-hot-top">{{ index + 1 }}</view>
							<view class="search-hot-word">
								<view>
									{{ item.searchWord }}
									<image :src="item.iconType ? item.iconUrl : ''" mode="aspectFit"></image>
								</view>
								<view>{{ item.content }}</view>
							</view>
							<text class="search-hot-count">{{ item.score | formatCount }}</text>
						</view>
					</view>
				</block>
				<!-- 搜索结果 -->
				<block v-else-if="searchType == 2">
					<view class="search-result">
						<view class="search-result-item" v-for="(item,index) in searchList" :key="index"
							@tap="handleToDetail(item.id)">
							<view class="search-result-word">
								<view>{{ item.name }}</view>
								<view>{{ item.artists[0].name }} - {{ item.album.name }}</view>
							</view>
							<text class="iconfont iconbofang"></text>
						</view>
					</view>
				</block>
				<!-- 搜索建议 -->
				<block v-else-if="searchType == 3">
					<view class="search-suggest">
						<view class="search-suggest-title">搜索“{{ searchWord }}”</view>
						<view class="search-suggest-item" v-for="(item,index) in suggestList" :key="index"
							@tap="handleToWord(item.keyword)">
							<text class="iconfont iconsearch"></text>
							{{ item.keyword }}
						</view>
					</view>
				</block>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import {
		searchHot,
		searchWord,
		searchSuggest
	} from '../../common/api.js'
	import '../../common/iconfont.css'
	export default {
		data() {
			return {
				searchHot: [],
				searchWord: "",
				historyList: [],
				searchType: 1,
				searchList: [],
				suggestList: []
			}
		},
		onLoad() {
			searchHot().then((res) => {
				if (res[1].data.code == '200') {
					this.searchHot = res[1].data.data;
				}
			});
			uni.getStorage({
				key: 'searchHistory',
				success: (res) => {
					this.historyList = res.data;
				}
			});
		},
		methods: {
			// 搜索需要的一系列行为
			handleToSearch() {
				this.historyList.unshift(this.searchWord);
				// 使用set保证搜索记录的唯一性
				this.historyList = [...new Set(this.historyList)];
				if (this.historyList.length > 10) {
					this.historyList.length = 10;
				}
				uni.setStorage({
					key: 'searchHistory',
					data: this.historyList
				});
				// 调用接口函数
				this.getSearchList(this.searchWord);
			},
			// 清空搜索记录及其本地记录
			handleToClear() {
				uni.removeStorage({
					key: 'searchHistory',
					success: () => {
						this.historyList = [];
					}
				});
			},
			// 搜索动作本身
			getSearchList(word) {
				searchWord(word).then((res) => {
					if (res[1].data.code == '200') {
						this.searchList = res[1].data.result.songs;
						this.searchType = 2;
					}
				});
			},
			// 清空搜索框
			handleToClose() {
				this.searchWord = '';
				this.searchType = 1;
			},
			// 获取搜索关键词
			handleToSuggest: uni.$debounce(function(ev) {
				let value = ev.detail.value;
				// console.log("search-word:" + this.searchWord)
				// console.log("value:" + value)
				//为空返回第一页
				if (!value) {
					this.searchType = 1;
					return;
				}
				// 根据关键词获得搜索建议
				searchSuggest(value).then((res) => {
					if (res[1].data.code == '200') {
						this.suggestList = res[1].data.result.allMatch;
						this.searchType = 3;
					}
				});
			}),
			// 赋值searchword并直接搜索
			handleToWord(word) {
				this.searchWord = word;
				this.handleToSearch();
			},
			handleToDetail(songId) {
				uni.navigateTo({
					url: '/pages/detail/detail?songId=' + songId
				});
			},
		}
	}
</script>

<style scoped>
	.search-bar {
		display: flex;
		background: #f7f7f7;
		height: 73rpx;
		margin: 28rpx 30rpx 30rpx 30rpx;
		border-radius: 50rpx;
		align-items: center;
	}

	.search-bar text {
		margin: 0 27rpx;
	}

	.search-bar input {
		font-size: 26rpx;
		flex: 1;
	}

	.search-history {
		margin: 0 30rpx;
		font-size: 26rpx;
	}

	.search-history-head {
		display: flex;
		justify-content: space-between;
	}

	.search-history-list {
		display: flex;
		margin-top: 36rpx;
		flex-wrap: wrap;
	}

	.search-history-list view {
		padding: 20rpx 40rpx;
		background: #f7f7f7;
		border-radius: 50rpx;
		margin-right: 30rpx;
		margin-bottom: 20rpx;
	}

	.search-hot {
		margin: 30rpx 30rpx;
		font-size: 26rpx;
		color: #bebebe;
	}

	.search-hot-title {}

	.search-hot-item {
		display: flex;
		align-items: center;
		margin-top: 40rpx;
	}

	.search-hot-top {
		width: 60rpx;
		color: #fb2221;
		font-size: 34rpx;
	}

	.search-hot-word {
		flex: 1;
	}

	.search-hot-word view:nth-child(1) {
		font-size: 26rpx;
		color: black;
	}

	.search-hot-word image {
		width: 48rpx;
		height: 22rpx;
	}

	.search-hot-count {}

	.search-result {
		border-top: 2rpx #e5e5e5 solid;
		padding: 30rpx;
	}

	.search-result-item {
		display: flex;
		align-items: center;
		border-bottom: 2rpx #e5e5e5 solid;
		padding-bottom: 30rpx;
		margin-bottom: 30rpx;
	}

	.search-result-item text {
		font-size: 50rpx;
	}

	.search-result-word {
		flex: 1;
	}

	.search-result-word view:nth-child(1) {
		font-size: 28rpx;
		color: #3e6694;
	}

	.search-result-word view:nth-child(2) {
		font-size: 26rpx;
	}

	.search-suggest {
		border-top: 2rpx #e5e5e5 solid;
		padding: 30rpx;
		font-size: 26rpx;
	}

	.search-suggest-title {
		color: #537caa;
		margin-bottom: 40rpx;
	}

	.search-suggest-item {
		color: #666666;
		margin-bottom: 70rpx;
	}

	.search-suggest-item text {
		color: #c2c2c2;
		font-size: 26rpx;
		margin-right: 26rpx;
	}
</style>
